Curious about this answer. Do you have any example in which prices of goods and services actually went up after more competition entered an industry? In case you do, are you sure you aren't cherry picking?
I don't have any of my old economics notes nor the market reports I have read on hand but generally it's natural monopolies that have competition introduced, these are not particularly good analogue for software but they do have similarities with social media and mapping applications. Competition is generally good for consumers who are engaged but it's a means to an end. It is not good for its own sake.
Markets where competition works really well are elastic and have consumers with the appropriate amount of engagements from the consumers.
